<html>
    <head></head>
    <body>
        <div id='doneDiv'></div>
        <iframe src='https://www.youtube.com/embed/gwO7k5RTE54?wmode=opaque&amp;enablejsapi=1' onload='document.getElementById("doneDiv").innerText = "Done!"'></iframe>
    </body>
</html>
